Improvement in iviachines for cutting veneers



.Y .2 Sheets--Sheet l. N. SEIB.

'Machines for Cutting Veneers. No. 145,245. Patented nec. 2,1873.

2 Sheets--Sheet'l N S El B.

y Machines for Cutting Veneers. A N0. 145,246. Patented Dec.2,1873.

f 'vez UNITED STATES PATENT :einen JOHN N. SEIU, OF BOSTON,MASSA(HUSETTS.

IMPROVEMENT iN MACHINES FOR CUTTING VENEERS.

Specification forming pari of licitus latfnt No. 145,1?46, datedDeccmhfr 2, 12573,; application filed O-.tcher 2, 1873.

To all fic/tom lit may concern:

Be it known that I, J onN N. SEIB, of lost0n, in the county of Suffolkand State-of Massachusetts, have invented a new and useful Improvementin Machine for Cuttin g Veneers 5 and I do hereby declare the followingto be a full, clear, and exact description thereof, which will enablethose skilled in the art to make and use the same, reference being hadto the accompanying' .drawing forming part of this specification, inwhich drawing- Figure'l represents a sectional side view of myveneer-cutting machine, when the same is fitted up for cutting straight.Fig. 2 is a transverse vertical section of the same. Fig. 3 is adetached section of the log-carrier in a larger scale than the previousfigures. Fi 4 is a similar section of the knife-clamp. Fig. 5 is a planor top view of the veneer-cutting machine when fitted up for cuttingcircular. Fig. 6 is a transverse section of the same. Fig. 7 is atransverse section of the circular log-carrier in a larger scale thanthe previous figures. Fig. 8 is a detached side view of one of thejournal-boxes which form the bearings for the shaft support-ing thecireulanlog carrier.

Similar letters indicate corresponding parts.

This invention is an improvement on the veneer-cutting machines patentedto me August 20,1872, April l, 1873, and August 5, 1873; and relates tothe mechanism for imparting motion to the log-carrier and to the feedmechanism of the knife-carriage in cutting straight; further, to theconstruction of the 10g-retaining dogs on the log-carrier in cuttingstraight; also, to the means used for adjusting the knife at therequired inclination or rake in cutting from different kinds of wood;further, to the construction of the circular log-carrier; also, to theconstruction of the journal-boxes which form the bearings for the shaftsupporting the circularlog carrier.

In the drawing', the letter A designates the bed which forms the supportfor my machine. From this bed rise two standards,B B, the edges of whichare dovetailed and form the guides for the stay-log C, to which a flator rectangular log is secured, as shown in Figs. 1 and 2. Said stay-logconnects, by rods a,

with working-beams I), which swing' on pivots c, and to which anoscillating motion is imparted by connecting' them to eccentricwristpins d secured in cog-wheels c, which are mounted on the oppositeends of a shaft, f. (Also seen in Fig. 5.) From one of the pitmen-rodsg, which form the connection between the eccentric wrist-pins d and theworking-beams b, extends a rod, 7L, to a lever, t, that swings freely ona shaft, j, and carries the feed-dogs 7.: l. rIhese feed-dogs extendfrom the lever 'L' in opposite directions, and they engage with acog-wheel, m, that is mounted on the shaft j. Behind this cog-wheel issituated a disk, a, a segment of which is equal in diameter to theextreme diameter of theeog-wheel, while the diameter of the remainingportion is equal to that of a circle passing through the bottoms of thecogs of said cog-wheel.

The pawl L' is of such a width that it extends across the cog-wheel andthe disk n, but the pawl l engages simply with the cog-wheel m and doesnot extend across the disk n. If the lever fi swings in the direction ofarrow 1, Fig. l, the pawl l turns the shaft j during the entire motionof said lever i, but if this lever swings in the direction opposite tosaid arrow the pawl L' slides on the enlarged segment of the disk n anddrops in gear with the cogwheel m after having' passed said segment. Theshaft j is geared together with screwshafts o, which engage with blocksu, that support the knife-carriage E, and by the combined action of thedogs land L' the knife is fed forward just before the log commences itsdownward stroke, and before the log commences its upward stroke theknife is moved back a short distance, so that the log in its upwardmotion will not rub against the cutting-edge. The cog-wheels c gear intopinions p on the driving-shaft g, and by turning this driving-shaft aslow reciprocating motion is imparted to the log-carrier C. On the bed Ais hinged a standard,D,whieh, when turned up to the position shown inFig. 2, bears against the back of the log-carrier, and serves to steadythe same. In cutting from a circular log, this standard must be turneddown to the position shown in Fig. 5.

In a full-sized machine, where the log-carrier C is more than twelvefeet long, two or more hinged standards may be applied. Said log-carrieris provided with dogs r, Fig. 3, which extend through slots s, and theshanks of which are provided with slots to receive the ends of screws t,which are tapped into flanges on the log-carrier. In the outer ends ofeach dog` are two or more holes, u, to receive a pin, which serves toadjust the head of the dog, so that the same will project more or lessbeyond the surf'ace of the log-carrier. By means of the screws t thedogs are forced up against the 100. (See Fig. 2.)

rlhe knife-carriage E is secured to its supporting-blocks u by means ofscrews x, which are tapped into spheres or rollers y secured in saidblocks, Fig. l, and set-screws z, which pass through the langes of theknife-carriage, near its rear edge, serve to adjust the position of theknife in the desired inclination or rake, the roller-nuts y allowing thescrews x to accommodate themselves to any desired inclination. For hardwood, the rake of the knife must be different from what it is for softwood. The knife a! is secured to the knife-carriage by a series ofclamping-j aws, b', which are grooved to engage with a tongue on thebreast of the knife-carriage E', (Figs: 2, 4, and G.) Each of said jawsis drawn up against the knife by two or more clamping-screws, c', Fig.4, and set-screws d serve to press the faces of the jaws firmly upagainst the knife, so that the knife `is rigidly retained in position.By unscrewing the set-screws d ,the knife is released, so that it can bereadily removed whenever it may be desired, and not much time is lost inreadjusting said knife.

When it is desired to cut from a revolving log, the reciprocatinglog-carrier C is taken off and the revolving log-carrier Gr is inserted.This carrier is composed of two halves, (sec Figs. 5, 6, and 7 which areunited by screws, c', passing through lugs f. By unscrewing these screwsthe two halves can be taken apart, and by re-insertin g said screws thelog-carrier is firmly clamped on this shaft. In each end of thelog-carrier G is a groove, g', Fig. 5, to it in projections h', Figs. 2and 5, formed on collars of the shaft f, so that when the logcarrier isclamped on said shaft it is effectually prevented from turning roundindependent of said shaft. Each half of the log-carrier G is providedwith flanges t perforated with holes for the admission of screws j', bymeans of which the logs are secured to the log-carrier, as shown inFigs. 5 and 7. The shaft f has its bearings in braces II, Figs. 2 and 8,

which fit the corners of the standards B. Each of these boxes isprovided with a cap, 7c', that is secured in position by a screw, l',and a setscrew, m', the latter being made to pass through a lug, nf,projecting from the body of the box. The object of this arrangement isto bring the shaftf as close to the edges of the standards B as can bepractically done. If this shaft is far back of said edges, theknife-carriage, in order to enable the knife to cut close to thelog-carrier, has to be moved out beyond its support, since this supportcan only be made to extend within a certain distance from the standardsB, and if said knife-carriage has to be moved far out over its supportit is liable to tilt over when the log comes in contact with the knifeand the correct operation of the machine is disturbed. The feed-lever tis provided with two pins, o p', and if the machine is used with therevolving log-carrier G the rod h is changed from the pin o to the pinp',

and the reversing-pawl k is thrown out of gear. In cutting from acircular log it is not necessary to impart to the knife a backwardmotion.

XVhat I claim as new, and desire to secure by Letters Patent, is-

1. rlhe combination of pinions p, cog-wheel c, pitmen-rods g, working-beams b, rods a and h, feed mechanism 'i 7s Z on, knife-carriage E,and log-carrier G, all constructed and operating substantially in themanner herein shown and described.

2. rFhe standards D hinged upon the bed A,

in combination with the reciprocating log-carrier C, to operate in themanner and for the purpose specified.

3. rIhe log-retaining dogs r provided with adjusting-pins o andset-screws t, in combination with the log-carrier C, substantially asshown and described.

4. The combination of the knife-carrier E with the supporting-blocks u,the screws z x, and roller-nuts y, all constructed and arranged as andfor the purpose specified.

5. rIhe divided log-carrier G, having the lugs f and iianges fi andgroove g', in combination with the shaft f having the projections h',substantially as and for the purpose specied.

6. The clamping jaws b, provided with grooves to engage with aton gue onthe breast ot' the knife-carriage, in combination with the knife a',clamping-screws o', and set-screws d', substantially as described.

IVitnesses: JOHN N. SEIB.

HUGH J. S'rocKFonD, J osnrn F. PAUL.

